Head-gimbal assembly

A technology of universal joints and components, applied in the direction of supporting head, arm parts structure, driving/moving recording head, etc., can solve problems such as limiting positioning accuracy, and achieve the effect of rigidity improvement

Inactive Publication Date: 2011-04-06
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drive of the actuator by a voice coil motor (VCM) limits the positioning accuracy

Method used

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Examples

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Embodiment Construction

[0031] Preferred embodiments of the present invention are described below. For clarity of the description, descriptions and drawings will be omitted and simplified below as appropriate. In the various drawings, the same reference numerals denote the same elements. In order to clarify the description, the same descriptions are omitted as necessary. In the embodiments, a hard disk drive (HDD) is explained as an example of a disk drive.

[0032] The HDD of this embodiment is provided with a secondary actuator having a positioning mechanism based on a Voice Coil Motor (VCM) and a positioning mechanism based on one or more piezoelectric elements on the suspension (micro drive actuator actuator). The piezoelectric element is fixed to the top of the suspension. As the piezoelectric element expands and contracts, the suspension deforms, and the head slider is finely driven in the radial direction of the disk.

[0033] The suspension of this embodiment has a variable plate fixed t...

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Abstract

The invention is provided, in which the rigidity of the suspension can be increased without impeding the motion of the suspension responding to the expansion and contraction of the piezoelectric element. In accordance with an embodiment of the present invention, the base plate 205 is affixed to the top of the second section 435 of the deformable plate 204 behind the piezoelectric element 206. The base plate 205 includes left and right projection members 252a and 252b on the front edge. The projection members 252a and 252b project toward the first section 434, which is forward, while avoiding the piezoelectric element 206. The front edges 521a and 521b of the projection members 252a and 252b are positioned further forward than the position of the back edge 411 of the hole 241. The rigidity of the suspension 110 can be increased and the resonant frequency can be raised by the projection members 252a and 252b having this kind of shape.

Description

technical field [0001] The present invention relates to a magnetic head gimbal assembly, and in particular, to a structure for a magnetic head gimbal assembly having a piezoelectric element. Background technique [0002] An apparatus using various types of recording disks such as an optical disk, a magneto-optical disk, or a floppy disk is called a disk drive apparatus. Among them, a hard disk drive (HDD) has been widely used as a computer storage device, and has become an indispensable storage device in a current computer system. In addition, due to the superior performance of HDDs, applications of HDDs such as video recording and playback equipment, car navigation systems, or mobile phones are further expanded. [0003] Magnetic disks used in HDDs have a plurality of data tracks and a plurality of servo tracks forming concentric circles. A plurality of data sectors including user data are recorded in each data track. Each servo track includes address information. The s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B21/10G11B21/21
CPCG11B5/4873G11B5/4833
Inventor 曾我英司土田裕康
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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